Lead
It is inevitable that people will age as they age, so aging and death are processes that everyone will go through.
The lifespan of human beings is the time from birth to death, and the lifespan is closely related to the lifestyle and living environment of the species.
At present, the world's recognized oldest person is Yana-· Carmante of France, who died at the age of 122, which shows that human beings also have this possibility.
But theoretically speaking, how old is the ultimate life expectancy of human beings?
After listening to the scientist's explanation, let's understand the ins and outs of this problem.
The world's longest-lived elderly.
There are many people cheering on the topic of longevity, and there are a number of longevity competitions held in each region every year.
However, this kind of activity has no substantive significance for the elderly, even if it takes the first place, at least it means that the local people live longer, but there is no progress for human beings.
There are a large number of longevity villages in the mainland, and the following villages are very famous, such as Bama Village, Qingshou Village and Mingshi Village, all of which are listed as longevity villages in the mainland, and the average life expectancy in the villages can reach 90 years old.
But this longevity isn't just about eating a light diet, living a regular lifestyle, exercising, and some special longevity secrets.
From a certain point of view, the longevity village may be because of the comfortable environment and the absence of external disturbances, so that people can have inner peace and slow down the speed of aging.
Although there is some truth in this statement, scientists will not be satisfied with this statement, so a variety of studies have been conducted on long-lived elderly people.
For some specific long-lived elderly people, such as the world's longest-lived elderly Kalmante, study her genes, lifestyle, eating habits, etc.
In the end, it was found that although the old man Kalmante ate a lot of high-calorie foods, she never exercised, so even if she ate a lot of high-calorie foods, her body was not very good at digesting these excess nutrients.
But although this old man does not exercise, she likes to ride a bicycle very much, which is a bit special, is her longevity only related to cycling and not exercising?
Of course not, although the old man has a peculiar eating habits, her genetics are relatively good, and in general, the life experience of healthy life is what supports her to live to the age of 122.
Calculating human lifespan, scientists have given the answer.
With the development of science and technology and the progress of human civilization, people's average life expectancy is getting longer and longer, from dozens of years old or even falling to just over 20 years old to 80 years old.
However, although the average life expectancy of human beings is increasing, it does not mean that the ultimate life expectancy of human beings is also increasing.
Scientists have provided three methods for calculating the ultimate life expectancy of humans.
The first is derived from the life cycle method, which is mainly based on the ultimate lifespan of other organisms.
Scientists have found that the ultimate lifespan of multicellular organisms is directly proportional to the number of cells, and we can sense this very well from ourselves.
The researchers compared human cells with those of other animals and found that the number of human cells is about three times that of other animals, and the limit life span of other animals is generally 30 to 40 years.
In this way, the ultimate life expectancy of human beings is between 120 and 125 years.
The second method is the Hayfrick limit, which is derived from the number of cell divisions.
Haverick is a United Kingdom biologist who has studied the number of cell divisions and found that cell divisions are not infinite, but have a limit.
Normally, the number of cell divisions is between 40 and 60 times, and when the number of divisions reaches this limit, the cell enters the stage of division failure.
Studies have found that there is a type of cell called somatic cells, which is the most common type of cell, but it has a relatively small number of divisions.
In his research, Hayflick found that somatic cells typically only divide 40 to 50 times, so the fewer cell divisions, the longer the limit lifespan.
Therefore, the limit number of divisions of human cells is only 50 times, and the ultimate life span of human beings is usually 90 years old, so theoretically, the ultimate life span of human beings should be 125 years old.
The third method is the Bafeng coefficient method, which is derived according to the growth period.
Through the box analysis of human growth period and ultimate lifespan, Bafeng found that there is a direct relationship between human growth period and ultimate lifespan.
Studies have found that the ultimate lifespan of humans should be between 100 and 175 years.
Therefore, the ultimate lifespan derived by the three methods is similar, but in real life, there are also some people who live to a higher age.
For example, there is a 114-year-old man in Japan, although there are many long-lived elderly people in Japan, but 114 years old is still amazing.
This old man, born in 1721, has lived for more than 300 years.
But this is rare.
There is a big gap between the ultimate life expectancy of humans and real life.
Experimental data suggest that the human life limit should be between 125 years, and there are several formulas to derive it, but these are theoretical.
The real average life expectancy of human beings is only more than 80 years old, and in reality, the average life expectancy of human beings and the ultimate life expectancy are very different, and this phenomenon has a lot to do with the environment and living habits.
The impact of the environment on human aging is obvious.
Some clean environments can allow people to fully relax and bring a comfortable feeling of life, thus playing a health effect.
But on the contrary, some harsh environments will always endanger the physical and mental health of human beings.
Take the aquaculture industry as an example, environmental pollution will lead to an increased burden on the body, thereby shortening people's life expectancy.
In addition to genetics, lifestyle habits are also closely related to psychological factors and behavioral factors.
Psychological factorsStudies have shown that happy people live longer, so staying in a good mood can lead to a longer life.
Behavioral factors are manifested in some bad habits, such as staying up late and smoking and drinking, which endanger physical health and cause poor absorption of nutrients, thereby shortening life expectancy.
epilogue
Theoretically, the ultimate human lifespan is around 125 years, and this number is likely to increase in the future.
Because with the development of science and technology, the living conditions and medical conditions of human beings will definitely get better and better.
At the same time, future gene-editing technology can even allow humans to obtain the secret of immortality.
As a result, the ultimate life span of human beings will be far away.
If humans end up becoming ageless, I think psychological factors may directly lead to our agelessness. I wonder if you agree?